Printing gauges for platen presses



Sept. 4, 1962 H. L. CLOSZ PRINTING GAUGES FOR PLATEN PRESSES 5 Sheets-Sheet 1 Filed March 31, 1960 Sept. 4, 1962 H. L. CLOSZ PRINTING GAUGES FOR PLATEN PRESSES 3 Sheets-Sheet 2 Filed March 31, 1960 P 1962 H. CLOSZ 3,052,184

PRINTING GAUGES FOR PLATEN PRESSES Filed March 51. 1960 5 Sheets-Sheet 3 .292 we 72 507" 272 L. Q'Zas'z United States Patent 3,052,184 PRINTING GAUGES FOR PLATEN PRESdES Henry L. Closz, 5020 S. Elizabeth, Chicago, ill. Filed Mar. 31, 1960, Ser. No. 19,042 18 Claims. (Q1. 101-415) This invention relates to platen register gauges for printing presses, and particularly to such gauges equipped with fenders.

In the use of printing presses of the Gordon type where each piece of stock is manually or mechanically inserted and removed and must be accurately located on the platen while the press is otf impression, a plurality of register-gauges is used on the flat feed-platen, and these platen-gauges are generally repositioned for each different job, being secured in position, first tentatively, then finally on the slick tympan-top-sneet extended across the fiat face of the platen which is essentially a steel plate with a flat ground working surface.

The platen gauges must be of such a character that each fed sheet may be quickly registered thereon during the short period when the press is open; in facilitating such rapid engagement, a point has always been made of equipping the gauges with resilient fenders of strip material such as thin-brass strap. Such fenders overlie the adjacent border portions of the sheet so that during impression, these fenders are usually engaged by lockup parts of the type chase and are bent downwardly toward the sheet. Then, as the chase or form is retracted the fenders are intended to cooperate with usual grippers, fingers and the like to separate the sheet from the inked type matter and make sure that the sheet remains in place on platen or tympan sheet.

Fenders of the aforesaid character have been found to be objectionable because of the difiiculties involved in associating the fenders with the gauges and because these prior fenders are so easily buckled and bent in use.

The problem of mounting the gauge blocks on or in association with the flat platen of a Gordon type press has been handled in many different ways, some of which involve adjustable carrier bars for the gauges so that the gauges are to some extent adjustable as to general position and final register, and in other instances it has been the practice for the printer to secure the gauges to the tympan by gluing, or stabbing, or by cutting slits in the tympan cover for inserting a clamping member. When the tympan is pierced, or when the gauges are glued to the tympan, usually such portions of the expensive tympan cover are ruined so that frequent, entire replacements of said cover are required, perhaps only four percent used.

In all of the prior methods of securing platen gauges to or in position over the tympan sheet, even using glue, difiiculty has been experienced in the printing operation because of the tendency of the forward or gauging ends of the gauges, remote from their center of grip, to become upwardly spaced from the tympan cover with the result that the stock upon which the impression is made often feeds under the gauge and the printed impression is made in the Wrong location on the stock, meaning time out to cut Vs in the tympan cover, and frequent stopping to raise the V-tips.

With the foregoing in mind, it is the primary object of the present invention to simplify the use of presses of the Gordon type, and more particularly, it is an object of the present invention to provide gauge blocks of an improved character simply mountable on or removable from the tympan cover or the bare steel of the Gordon press platen without damage to either, and which dependably hold tightly against either, so that even at high speeds, the register will correspond fully with the grade of feeding, and pile-ups of fed stock under a gauge block on automatics will never get a chance to start.

"ice

Other and related objects of this invention are to provide, as before intimated, for printing presses, gauges which have fenders associated therewith in a novel manner so that the tenders have improved actions before, during and after the printing couple: catching, yielding resiliently, retrieving; plus vastly lengthened serviceability; and a further and more specific object of the invention is to provide platen gauges wherein tightness of the gauge against the tympan cover is assured by magnetic means.

More specifically, it is an object of this invention to provide platen gauges in the form of permanent magnets wherein the magnetic poles are so related to the gauging and fending elements that the gauge blocks hold firmly against the tympan cover without danger from magnetic involvement with any opposed ferrous elements of or within the type chase, feeder, or gripper assembly.

Other and further objects of the present invention will be apparent from the following description and claims, and are illustrated in the accompanying drawings, which by way of illustration, show preferred embodiments of the present invention and the principles thereof, and what is now considered to be the best mode in which to apply these principles. Other embodiments of the invention embodying the same or equivalent principles may be used and structural changes may be made as desired by those skilled in the art without departing from the invention.

In the drawings:

FIG. 1 is a fragmentary perspective view of the flat feed platen of a Gordon-type press readied with platengauges embodying the features of this invention;

FIG. 2 is a view showing a form of platen gauge and fender assembly embodying the invention;

FIG. 2A is a side elevational view of the gauge shown in FIG. 1.

FIG. 3 is a perspective view of a platen gauge and fender assembly embodying the features of the invention and adapted for use in the printing of ganged shipping tags;

FIG. 3A is in FIG. 3;

FIG. 3B is a detail of the fender;

FIG. 4 is a perspective view of and fender assembly embodying invention;

FIG. 4A is a side view of the platen gauge shown in FIG. 4; and

FIGS. 5 and 6 are perspective views showing other forms of platen gauges and fender assemblies embodying the invention.

For purposes of disclosure the invention is illustrated in FIG. 1 as embodied in a set of three platen gauges 20 secured in place on the flat platen 21 of a Gordon type press 22. The platen 21 is of the usual steel plate type over the ground top surface of which a tympan sheet 23 is extended and is secured in place by tympan bails 24 along the front and rear edges of the platen 21. In presses of this type, gripper fingers 25 are ordinarily employed and are carried on grippers 25A and are operated in the usual manner. The view shows a dip-feeding application, handling stock that is often curly.

I The platen gauges 20 are put in place upon the tympan sheet or cover 23 in the margins thereof, and in such relation that the low edge of the sheet or stock S shall engage the operative gauging faces of two bottom gauges 20, while a side edge of the sheet engages the gauging a side elevational view of the gauge shown view showing the torsional action another platen gauge the features of the face of another of the gauges 20. The platen gauges 20 are provided with projecting fenders 28 as will hereinafter be described in detail, and under and in accordance with the present invention, the platen gauges are held firmly in a platenward direction against the tympan cover 23 by magnetic action as will be described. To complement the magnetic action, particularly in holding the gauge blocks against any wandering or shifting, on the slick tympan cover 23, from the register and alignment set, each gauge 20 has a strip of pressure adhesive tape 30 extended across and adhered to the gauge block and to adjacent areasof the tympan cover 23 as shown in FIG. 1 of the drawings, which tape, for instance common masking tape, is unmarringly and cleanly peelable from the cover 23, giving unlimited repositionability.

Under the present invention the platen gauges 20 may take different 7 forms subservient to a vastly increased range of work, and several exemplary forms of the invention are illustrated in FIGS. 2 to 6 of the drawings. Throughout the various forms of the platen gauge body and fender structures that are illustrated herein, par-ticula-r physical forms and relationships are employed and particular relationships of the magnetic circuits are used whereby ease of handling and mounting are attained and efiicient operation of the gauges is assured. It is noted that the length and shape of the projecting ends or tips of the fenders as herein shown is merely illustrative, it being the common practice of pressmen to modify these characteristics of fenders to suit job requirements or personal preferences.

In FIGS. 2 and 2A of the drawings the present inven tion is illustrated as embodied in a magnetic platen gauge 220 having a fender 228. The platen gauge 220 is formed from either cast or sintered magnetic material in an elongated blockalike form having parallel front and rear faces 220F and 220B, parallel side faces 220L and 220R, and a top face 220T disposed at right angles to the aforesaid side and end faces. The flat parallel characteristic of the side faces is not essential, as will become apparent in connection with the description of other embodiments of the invention. The bottom surface of the platen gauge is formed with two flat faces or piers 220P extended across opposite end portions of the bottom surface of the block, the piers being in a common plane parallel to the top surface 220T and at right angles to the side and end surfaces. Intermediate the piers 2201 the bottom surface of the block is spaced upwardly from the plane of the piers as indicated at 220E so as to enable the piers 220P to serve as well defined spaced magnetic poles extending to the respective ends of the block. The magnetic material is oriented and is magnetized to a magnetic pattern somewhat like the pattern indicated at M in FIG. 2A, thus to concentrate the magnetic flux lines in the opposite piers 220P as the magnetic poles of the platen gauge.

Spaced from the opposite ends of the bottom surface 220B of the gauge, a pair of transverse grooves 220G are formed in such bottom surface, and these grooves serve respectively to define the adjacent sides of the piers 220P and also function in the mounting and association of the fender 228 with the platen gauge.

The fender 228 is formed from spring steel wire having a diameter of about .024 inch which is substantially less than the depth of the groove 2206, and the fender 228 is bent to a form such that portions of the wire from which the fender is made may extend transversely of the block or gauge body within the grooves 220G in a resiliently interlocked relation wherein the magnetic action of the gauge body holds the fender in place during mounting or placement of the gauge, while at the same time allowing for limited movement of parts of the fender 228 as this movement is required in the event of engagement of the projecting portion of the fender with parts of the form, or as this is required when upward forces are applied to the projecting portion of the fender during the separation of the printing couple.

Thus the fender 228, as shown in FIG. 2, comprises a forwardly projecting arm portion 228A which at its rear end extends downwardly and rearwardly at an angle as at 228B in FIG. 2. At the lower end of the portion 228B the wire is bent laterally as at 228C so as to extend transversely of the gauge through the forward groove 220G. The portion 22813 is illustrated in FIG. 2 as being positioned against the side 220R, and at the opposite end of the cross member 228C, the wire is bent rearwardly as at 2231) so as to extend along the other side 220L. At a point adjacent the forward side of the other groove 2206, the wire is bent to form another transverse portion 228E that extends transversely of the gauge body through the other groove 2206, and at the other end of this groove, the wire is bent to provide an arm 228F that extends along and engages the other side 220R of the gauge.

It will be noted that the wire forming the fender 228 is so bent and formed that the arm 228C extends from the right forward portion of the forward groove 220G in a leftward and slightly rearward direction to the other end of the groove, while the arm or cross member 228E of the fender extends from the forward left edge of the rear groove 220G in a rearward angular direction so that near the side 220R it engages the right rear side of its groove as shown in FIG. 2. The resiliency of the fender is thus enhanced in that it is resilient in an up and down direction and in a front to rear direction, and the fender is 161d in place on the block or gauge 220 by the resilient action of the various arms against the sides of the grooves and against the sides of the gauge. With this arrangement, the arm 228A of the fender may be bent downwardly to either of the dotted line positions shown in FIG. 2, and these movements are resisted primarily by torsion in the transverse portion 228C and by bending of the transverse portions 228C and E within the grooves 220G.

In FIGS. 3, 3A and 3B, the invention is illustrated as embodied in a gauge 320 that has a fender 328 associated therewith, and is adapted particularly for use with ganged shipping tags where one such gauge 320 is provided for engagement with each of the endward V-notches between adjacent tags of a gang thereof even for such gangs with strings dangling.

The gauge 320 has the body thereof formed from a magnetic material, for instance, oriented Alnico V, and is greatly elongated in character with side faces 3201. and 320R and a transverse rear face 320B. At its forward end, the gauge is formed with angmlarly related vertical faces 320F that meet in a vertical forward edge and these faces are disposed at an angle corresponding to the standard angle of the V-notch used in the tags that are to be printed, and the median of this angle is parallel to the overall median of the gauge body.

The gauge 320 has a top surface 320T, and has a bottom surface 32L that is nearly flat, but is formed grazed so as to be concave very slightly in an upward direction, thereby giving the contact of the base ends with the tympan sheet a detectable pier-effect as designated at 320P in FIG. 3A. The gauge is magnetized the long way, with at least a slight down U-ing of the poles being sought; and care is taken that the pointed end is not jolted by a heavy charger.

Along its upper face 320T, the gauge is formed with a longitudinal groove 3206, that extends along the overall median from front to rear and preferably the groove 320G is offset laterally with respect to the line which would extend rearwardly from the forward vertical edge of the diamond head of the gauge. The rear portion of the upper face 320T may be cut away at the angle 320K when this is desired. The rear portion of the side face 3 20L is inset as at 320L-1, while the forward port-ion of the side 320R is equally inset as at 320R-L The fender 328 is also formed from spring steel wire, possibly .033" and has a forward arm 328A which will be described hereinafter, and at its rear end the arm is connected to an elongated portion 328B that is curved or bowed very slightly for purposes that will appear hereinafter. The portion 328B extends rearwardly beyond the rear face 320B of the gauge and is bent laterally at 328C and then forwardly at 328D. At the forward end of the portion 328]) the wire is bent downwardly at 328E and then rearwardly at 328F as shown in FIG. 3. The portions 328B and 328D are spaced laterally so that the portions 328E and 328F work within inset portion 320L-1 of one side of the gauge.

The portion 328B of the fender is bowed as above pointed out so that when the press is off impression the forward portion of this member projects from the forward end of the base of the groove 320G at one side of the apex of the diamond head 32%, and in the present case, it projects from the side that is opposite and away from the fender rear-outrig that is provided by the members 328C to 328E, whose function is to prevent twirling of the fender in the above groove 320G. The projecting tip 328A extends somewhat laterally of the gauge block, and in a slightly upward direction as shown in full lines in FIG. 3B, and in the event this arm 328A of the fender is engaged by less-than-type-high shoulders of the form, the downward deformation of the arm 328A is accomplished primarily by twisting or torsion in the member 32813 that extends rearwardly in the groove 620G. Moreover, any rearward jamming of the arm 328A is absorbed in some instances by rearward displacement of the fender, irrespective of the body and taping, or by lateral movement of the member 32313 in the groove 3206. The fender 323 is chiefly held in place by magnetic action of the gauge 329, particularly the strong centerflux under the groove 3206 near the ends thereof, but the taping assists.

In FIGS. 4 and 4A of the drawings another platen gauge 42%} wherein the gauge body is provided by a plurality of sections or bars that have been separated as a group from a chain-cast series of bars. Such castings of magnetic material usually contains a relatively large number of separable sections that have front and rear faces 4201- and 420B and top and bottom surfaces 420T and 420L, and the definition of the sections being by parallel front to rear grooves 420G, and front and rear notches 420N intersect or are aligned with the grooves 42%. To form a gauge body that includes three bars, as in FIG. 4, the chain casting is separated by breaking along every third valley defined by the repeated sets of front and rear notches and top grooves, thus forming somewhat rough side edges such as the side edge 420Y shown in FIG. 4. The bars of the body 420 also have transverse special locating grooves 4MP formed in the top surface thereof near the front and rear edges of the top surface.

The gauge 421 has a fender 428 made from a single piece of resilient steel wire to provide two forwardly projecting arms 428A. The fender 428 has a front crossreach 428C that is located in the front groove 420T and is bent downwardly slightly at its emerging points to engage the sloping surfaces of the body at these points, and is then extended rearwardly to provide portions 428B that rise gradually toward the top height of the body and extend rearwardly beyond the rear end of the body.

At the rear, the portions 428B are bent again, toward each other and considerably downward to provide cross members 428D, and are then bent forwardly to provide the arms 428A that are disposed in the two grooves 4206 on opposite sides of the center bar of the auge body, rising from the valley bottoms near their rear into springwise contact with the underside of the cross reach 428C and extend forwardly beyond the gauging face 4201 as shown in FIG. 4, into arms or acting fender tips 428A.

The body 425) is magnetized to the general pattern shown at M in FIG. 4A, and the bottom surface 420'L may be formed detectably concave for end tightness and thereafter ground to provide that the magnetic pole faces are truly coplanar.

In FIG. 5 of the drawings the invention is illustrated as embodied in a platen gauge 520 having a body made from magnetic material that is rectangularly shaped, and which has piers at its opposite ends to provide magnetic poles of the kind hereinbefore described. In this instance, however, the bottom or lower surface of the block has a relatively wide transverse groove 5206 which extends between the piers and which is adapted to receive a fender mounting bracket 530 that is made from sheet brass. The bracket 53! has a lower portion that extends through the groove 5206 and at its opposite sides is bent upwardly at 530U so as to embrace the opposite sides of the gauge block. Near the top of the gauge block the sheet metal of the bracket is bent downwardly at a slope as indicated at 5303, and at substantially the level of the center portion of the bracket, the ends of the brass sheet are bent inwardly as at 530B. The bracket thus provides two front to rear passages defined by parts 530U, 5308 and 53GB, and these passages are utilized to receive elements of a resilient fender 528 formed from resilient wire of the kind hereinbefore described. However, in this instance, the unit is intended for heavy duty and wire of a somewhat larger diameter may be used. The fender 528 has a forwardly projecting arm 528A that extends rearwardly through the passage that is provided at its side of the bracket 530, and at its rearmost reach the wire is bent laterally to provide a cross member 528C that extends, downwardly to the left rear corner of the gauge block where the wire is bent at an angle forwardly as at 528D to extend into the rear end of the other passage of the bracket 53%. Within this passage the wire is bent back and forth as at 528E, then extends forwardly out of the passage and has an enlargement 528F formed thereon that engages the forward edge of the bracket to prevent undesired rearward displacement of the fender 528. The fender 528 may be readily put in place by insertion of the two opposite parts thereof into the passages of the bracket, and when in place, it is held by engagement of the bent enlargement 523E with the bracket. This form of fender may bend downwardly to various positions such as those shown in dotted lines in FIG. 5, and its upward retracting or return movement is limited by the bracket 530, and the looped tip shown at 528A is only a sample of endless ways pressmen may tailor the wire. The member 528C allows resilient rearward retraction.

In the embodiment of the invention shown in FIG. 5 of the drawings, the bracket that removably receives the wire fender is held in position by a single gauge block, but in some instances it is desirable to hold the fender and the fender block in position with greater force. In such instances, a fender bracket may be provided that is held in place by two gauge blocks of the kind illustrated in FIG. 5. Such a heavy duty bracket structure is illustrated in FIG. 6 of the drawings wherein a brass sheet is bent to provide a bracket 630B into which a fender 628 may be inserted. The bracket 63013 is intended to be held in place by two gauge blocks of the structure illustrated in FIG. 5, and the bracket 639B therefore has a front to rear length equal to the width of the relatively large groove 520G of FIG. 5, with some slight play allowed.

Thus, the bracket 630B has a mid portion being identified as a housing 631, and the lower edges of the side walls of the housing 631 are bent outwardly in a common plane to provide base flanges 632. It is upon these base flanges 632 that the two gauge blocks are positioned.

At its rear end, and centrally thereof, the housing 631 has a rearwardly projecting arm 636 with a downwardly projecting hook 636E at its rear end, this hook being utilized as will be described in holding the fender 628 in position against rearward displacement.

The fender 628 is made from spring steel wire of the kind hereinbefore described, and it has a pair of arms 628A that are parallel and which extend forwardly through the housing 631 so as to project beyond theforward edge of the housing. At their rear ends the arms 628A are bent so as to extend in opposite lateral directions, and provide arms 6281-1, and at their outer ends the arms 7 628H are bent forwardly in substantially a horizontal relation as at 628U. The portions 628U are then bent toward each other as at 628K so as to be located near the upper rear edges of the magnets that are used. The portions 628K merge into a slightly rising forwardly projecting loop 628L. The loop 62$L is engaged with the hook 636H, thus to hold the fender 628 against undesired rearward and lateral displacement within the housing 631. The fender 628 however may be readily released by depressing the loop 628L.

It is to be noted that the arms 628A extend forwardly through the housing 631 with a relatively great downward inclination into substantial contact with the tympan surface relatively close to the rear part of the assembly, and then curve upwardly on a gradual curve into spring contact with the top wall of the bracket so that the arms 628A project from the forward side of the housing, thus to limit upward movement of the arms 628A in the separation phase of the printing cycle, and assure that the arms 628A will be in their raised positions at the feed phase of the cycle. The arms 628A as thus supported yield downwardly or rearwardly as may be required in the operation of the press, and yet when the arms 628A are to perform their hold-down function, they have a firm but resilient action in which the rear ends of the arms may be forced somewhat downwardly into contact with the bed or platen.

With both of the bracketed embodiments of the present invention as shown in FIGS. and 6, particular utility is attained because the pressman may remove and replace the wire fenders without disturbing the setting of the associated gauge blocks.

The fendered printing gauges that are thus provided by the present invention represent a marked improvement in the art as to reliability of operation and as to simplicity of mounting and positioning on the press. Furthermore, these fendered printing gauges of this invention provide for movement of the extending arms of the fenders in such a way that these arms may bend freely as required upon press closure, and yet return to their effective holding or stripping positions wherein they serve to aid in stripping the printed sheet from the inked type faces.

In all of the embodiments of the invention, the fenders are associated with the gauge blocks in a relatively loose relation and yet are urged resiliently toward their normal raised position so that the sheet may be put in place beneath the fenders and against the gauging faces of the gauge blocks. The yielding movements of the fenders, even when jammed, may take place without disturbing the setting of the gauge blocks, and the torsional as well as the trapezoidal bending actions of the fender wires with respect to the gauges take place without wear or objectionable fatique of the fenders. The relatively thick round wires which may be readily bent and tailored by the pressman to engage the sheets in different ways and at different angles have been found in practice to enable the pressman to attain improved operation, particularly with stock that tends to drag against the fender tips.

In the mounting of the fendered printing gauges on the press, the permanent magnetism of the gauge blocks enables the blocks to be quickly located, and the blocks remain in their initial positions while the pressman applies the tape such as tape 30 to the top of the gauge blocks. Then the pressman, by holding the opposite ends of the tape, may adjust the gauges with respect to the guide lines on the tympan sheet to their final positions in which they are then secured by pressing the opposite ends of the tape downwardly onto the tympan sheet. This way of mounting the gauges does not destroy or mar the tympan sheet, and the pressman may pull up the ends of the tape and readjust the gauge as many times as may be required in a single job or in successive jobs. This is accomplished without damage to the tympan sheet.

When the fendered printing gauges of this invention have thus been put in place in their final positions through the use of the tape '30, they are held against lateral displacement by the action of the tape and also to a lesser extent by the magnetic action of the gauge blocks, and in this regard the magnetic action of the gauge blocks serves during the sheet feeding operation to hold the gauge face of each block firmly against the tympan sheet so that there is no danger that a sheet will be fed to a position under or beyond the gauging face.

From the foregoing description it will be apparent that the present invention provides new and improved printing gauges that materially facilitate the set up and operation of printing presses of the platen type, and further it will be clear that under this invention the firm engagement of the gauging face of each block with the tympan sheet is assured so that accurate registry is attained, and the tenders are of such a character that they may freely bend as required while at the same time serving their stripping function.

Thus, while preferred embodiments of the invention has been illustrated herein, it is to be understood that changes and variations may be made by those skilled in the art without departing from the spirit and scope of the appending claims.

I claim:

1. In a fendered printing gauge for printing presses, permanent magnet means having a lower face adapted to rest on a ferrous printing platen and magnetized in an inverted generally U-shaped pattern terminating in spaced coplanar poles in said lower face, said permanent magnet means having a gauge face intersecting and perpendicular to said lower face, and a fender made from resilient steel wire disposed outside of and removably associated with and held in position by said permanent magnet means with one end projecting beyond said gauge face for lateral and up and down shifting movement relative thereto.

2. In a fendered printing gauge for printing presses, permanent magnet means having a lower face adapted to rest on a ferrous printing platen and magnetized in an inverted generally U-shaped pattern terminating in spaced poles in said lower face, said permanent magnet means having a gauge face intersecting and perpendicular to said lower face, and a fender made from resilient steel wire and providing a mounting portion and a projecting arm, and means including a groove in said permanent magnet means in which said mounting portion is located and magnetically retained to removably associate the mounting portion with said permanent magnet means to locate said arm in a normal position wherein it projects beyond said gauge face for yieldingly resisted shifting movements relative to the gauge face in up and down and lateral directions.

3. A printing gauge for platen presses comprising an elongated block of permanent magnet material having a lower face formed to provide a pair of flat coplanar pole faces at opposite ends of the lower face and said block having a flat gauge face formed at a forward end of the block and intersecting at its lower edge with one of said pole faces at right angles thereto; said block being magnetized to an inverted generally U-shaped pattern terminating in said pole faces, a fender made from spring steel wire to provide a mounting portion and a forwardly projecting arm, said mounting portion being removably interlocked with said block and held magnetically in position to dispose said arm in a normal operation position wherein it projects forwardly from and beyond said gauge face in an upwardly spaced relation to the plane of said pole faces and is yieldingly movable up and down and laterally relative to the block.

4. A fendered printing gauge for platen presses comprising an elongated block of permanent magnet material having a lower face formed to provide a pair of flat coplanar pole faces at opposite ends of the lower face and said block having a flat gauge face formed at a forward end of the block and intersecting at its lower edge with one of said pole faces at right angles thereto; said block being magnetized to an inverted generally U-shaped pattern terminating in said pole faces, a fender made from spring steel wire projecting forwardly from and beyond said gauge face in an upwardly spaced relation to the plane of said pole faces, and means including bent portion of the wire and exterior surfaces of the block against which the bent portions bear for mounting said fender on said block for yielding movement up and down and laterally relative to the block, and means restraining the fender against movement rearwardly of the block.

5. A fendered printing gauge for platen presses comprising an elongated block of permanent magnet material having a lower face formed to provide a pair of fiat cplanar pole faces at opposite ends of the lower face and said block having a flat gauge face formed at a forward end of the block and intersecting at its lower edge with one of said pole faces at right angles thereto; said block being magnetized to an inverted generally U-shaped pattern terminating in said pole faces, a fender made from spring steel wire disposed in part in the magnetic field and projecting forwardly from and beyond said gauge face in an upwardly spaced relation to the plane of said pole faces, and means comprising exterior surfaces of the block interlocking other portions of the wire of said fender for yielding movement of the fender in lateral and up and down directions.

6. In a printing gauge for platen presses, an elongated block of permanent magnet material having upper and lower surfaces and having fiat coplanar pole faces on its lower surface at opposite ends thereof and a gauge face at one end meeting one of said pole faces at right angles thereto; said block having at least one longitudinal groove formed in the upper one of said surfaces for receiving and positioning an element of a fender, and said block being magnetized to a generally inverted U-shaped pattern and a spring steel wire fender having portions engaging said groove and other outer surfaces of the block to be held in place on the block by the magnetic field.

7. In a printing gauge for platen presses, an elongated block of permanent magnet material having upper and lower surfaces and having fiat coplanar pole faces on its lower surface at opposite ends thereof and a gauge face at one endmeeting one of said pole faces of said block having at least one groove formed therein and extending transversely of the block, said block being magnetized in an inverted U-shaped pattern terminating in said pole faces, and a spring steel wire fender having portions engaging said groove and other outer surfaces of the block to be held in place on the block by the magnetic field.

8. A printing gauge according to claim 7 wherein a transverse groove is formed in the lower surface of the block.

9. A printing gauge according to claim 7 wherein a transverse groove is formed in the upper surface of the block.

10. In a printing gauge for platen presses, an elongated block of permanent magnet material having upper and lower surfaces and having flat coplanar pole faces on its lower surface at opposite ends thereof and a gauge face at one end meeting one of said pole faces at right angles thereto, said block having a diamond-disposed forward end as its gauge face, the upper surface of the block having a longitudinal groove therein offset laterally from the V-diamond-shaped gauge face; and said block magnetized to a generally inverted U-shaped pattern; and a fender made from resilient steel wire bent to provide an arm extending beyond said gauge face and other portions engaging one side of the block for recovery from torsion applied to said arm, said arm also engaging said groove for transverse location of the arm.

11. In a printing gauge for platen presses, an elongated block of permanent magnet material having upper and lower surfaces and having fiat coplanar pole faces on its lower surface at opposite ends thereof and a gauge face at one end meeting one of said pole faces at right angles thereto, said block being magnetized in an inverted U- shaped pattern terminating in said pole faces, said block having at least one longitudinal groove and at least one transverse groove formed in its upper surface, and a spring steel wire fender having portions engaging said groove and other outer surfaces of the block to be held in place on the block by the magnetic field.

12. In a printing gauge for platen presses, an elongated block of permanent magnet material having upper and lower surfaces and having flat coplanar pole faces on its lower surface at opposite ends thereof and a gauge face at one end meeting one of said pole faces at right angles thereto, one of said surfaces of said block having at least one groove formed therein and extending transversely of the block, said block being magnetized to a generally inverted U-shaped pattern terminating in the respective pole faces, and a fender made from resilient steel wire bent to provide an arm projecting beyond said gauge face and other portions engaging said groove and sides of the block to locate the fender relative to the block, said fender being held interlocked with the block by the latters polarization, and yet, permitting some spring play of the fender relative to the block.

13. In a printing gauge for platen presses, an elongated block of permanent magnet material having upper and lower surfaces and having flat coplanar pole faces on its lower surface at opposite ends thereof and a gauge face at one end meeting one of said pole faces at right angles thereto; said block being magnetized to a generally U- shaped magnetic pattern terminating in the respective pole faces, said block having at least one groove formed transversely in said lower surface, and a fender formed from resilient steel Wire with one end thereof projecting forwardly beyond said gauge face and having other portions of said wire engaging said groove and opposite sides of the block to locate the fender relative to the block.

14. In a printing gauge for platen presses, an elongated block of permanent magnet material having upper and lower surfaces and having fiat coplanar pole faces on its lower surface at opposite ends thereof and a gauge face at one end meeting one of said pole faces at right angles thereto, one of said surfaces of said block having at least one groove formed therein, said block being magnetized to a generally U-shaped pattern terminating in the respective pole faces, and a fender including a resilient arm projecting beyond said gauge face and including other portions engaging said groove and other surfaces of the block within the magnetic field so as to interlock with the block and locate the fender relative to the block.

15. 'In a printing gauge for platen presses, an elongated block of permanent magnet material having upper and lower surfaces and having flat coplanar pole faces on its lower surface at opposite ends thereof and a gauge face at one end meeting one of said pole faces at right angles thereto; said block being magnetized to a generally inverted U-shaped magnetic pattern terminating in the respective pole faces, said block having at least one groove formed longitudinally in said upper surface, and a fender formed from resilient steel wire located loosely in said groove and with one end thereof projecting forwardly beyond said gauge face and having other portions of said Wire engaging other surfaces of the block to locate the fender relative to the block.

16. In a fendered printing gauge for platen presses, a fender bracket formed from a sheet of non-magnetic material to provide a flat holding portion with said sheet bent to provide an enclosed passage open at its ends, a gauge block of magnetic material having a transverse groove in its lower face embracing said holding portion of said bracket, said block being magnetized to a magnetic circuit terminating in the bottom surface of the block beyond opposite sides of the mounting portion, and a resilient wire fender having a first portion extending through said passage with an end projecting as an arm beyond the forward end of the passage, said fender having a lateral portion extended from the rear end of said first portion rearwardly of said passage with said lateral portion detachably anchored to the bracket, said first portion being curved to act resiliently to urge said arm to a normal raised position, and said lateral portion providing a yielding spring that may yield rearwardly and allow rearward displacement of the arm during press closure.

17. In a fendered printing gauge for platen presses, a fender bracket formed from a sheet of non-magnetic material to provide a flat holding portion with said sheet bent to provide an enclosed passage open at its ends, a gauge block of magnetic material having a transverse groove in its lower face embracing said holding portion of said bracket, said block being magnetized to a magnetic circuit terminating in the bottom surface of the block beyond opposite sides of the mounting portion, and a flexible wire fender extended through said passage and engaging inside surfaces of the passage to normally position an extending forward end of the Wire substantially at the level of the top of the passage, and means releasably holding the fender against undesired displacement rearwardly of the passage.

18. In a fendered printing gauge for platen presses,

a fender bracket formed'trom asheet of non-magnetic material to provide a flat holding portion with said sheet bent to provide an enclosed passage open at its ends, a gauge block of magnetic material having a transverse groove in its lower face embracing said holding portion of said bracket, said block being magnetized to a magnetic circuit terminating in the bottom surface of the block beyond opposite sides of the mounting portion, and a a flexible Wire fender extended through said passage and having an arm projecting out of the forward end of the passage in a normal relation substantially at the level of the top of the passage, and other portions of the Wire being interengaged with said bracket to resiliently urge said arm to said normal relation.

References Cited in the file of this patent UNITED STATES PATENTS 298,164 Blocher May 6, 1884 1,283,266 Murphy Oct. 29, 19-18 1,369,909 Turner Mar. 1, 1921 1,588,700 Brooks June 15, 1926 1,610,357 Cabella Dec. 14, 1926, 1,898,530 Flockhart Feb. 21, 1933 2,520,466 Diona Aug. 29, 1950 2,599,047 Clark June 3, 1952 2,674,187 Kluge Apr. 6, 1954 2,827,706 Fuller ,Mar. 25, 1958 

